Tape-controlling arrangement



1940- D. F. NEWMAN TAPE-CONTROLLING ARRANGEMENT Filed Feb. '7, 1938 3 Sheets-Sheet 1 INVENTOR. D vm E/VEWMHN BY wad- M ATTORNEYS Nov. 19, 1940. F, NEWMAN 2,221,922

TAPE- CONTROLLING ARRANGEMENT Filed Feb. 7, 1958 3 Sheets-Sheet 2 IN VENTOR. DF/v/D E NEWMHN ATTORNEYS Nov. 19, 1940. NEWMAN 2,221,922

TAPE-CONTROLLING ARRANGEMENT Filed Feb. 7, 1958 5 Sheets-Sheet 3 5 7 INVENTOR.

DHV/D ENEWMHN BY /6 0%,. M M

ATTORNEYS Patented Nov. 19, 1940 UNITED STATES PATENT OFFICE TAPE-CONTROLLING ARRANGEMENT Application February 7, 1938, Serial No. 189,042

8 Claims.

My invention relates to arrangements for controlling a character-bearing tape for movement through a projection field.

My invention has particular reference to a combined printing-projecting arrangement wherein the projection device may be positioned much closer to the printing device than has been customary with respect to prior art arrangements of this general character.

My invention has further reference to features of construction by virtue of which a combined device of the character described may be operated in an advantageous manner.

Various other objects and advantages of my invention will become apparent from the following description.

My invention resides in the tape-controlling arrangements, combinations and improvements of the character hereinafter described and claimed.

For an understanding of my invention'and for an illustration of one of the forms thereof, reference is to be had to the accompanying drawings, in which:

Figure 1 is' an elevational view of a tape-controlling arrangement as constructed in accordance with my invention;

Fig. 2 is an elevational view corresponding generally with Fig. 1 but showing some of the parts in different positions;

Fig. 3 is a plan view of the arrangement shown in Fig. 1;

Fig. 4 is a plan view showing a motor-controlling arrangement;

Fig. 5 is an elevational view taken on the line 5-5 of Fig. 4 looking in the direction of the arrows;

Fig. 6 is a diagrammatic view showing an electric circuit as arranged in accordance with my invention; s

Fig. 7 is an enlarged elevational view, partly in section, showing a feature of the invention;

Fig. 8 is a vertical sectional view, partly in elevation and is taken on the line 8-4 of Fig. 7

45 looking in the direction of the arrows;

. a mercury' switch arrangement; and

Fig. 12 is a transverse elevational view, partly in section, of the mercury switch arrangement shown in Fig. 11.

55 Referring to the drawings, P representsa suitable printing device such, for example, as a ticker mechanism of the type utilizable for printing two spaced rows of characters lengthwise on a narrow tape T or, as shown, of the type using a tape having a width of and known in Great 5 Britain under the designation The Exchange Telegraph Co. Ltd, by which a single row of characters are printed lengthwise on the tape which is opaque if desired although, in the form of the invention herein illustrated, said tape T 10 is of the transparent or translucent type and, therefore, adapted for through projection.

As herein shown although not necessarily, the ticker mechanism P comprises a housing i for a reel 2 utilizable as a support for a roll of the i5 tape, the housing 0 being carried by an arm which is secured to a wall 3 of the lower housing 4 of said ticker mechanism, the housing last named supporting an upper housing 5, and both housing being carried by a suitable base 6.

Referring to Fig. 10, the wall 3 is shown as carrying a bracket i which forms a support for a shaft 8 having projecting therefrom a pair of oscillatory arms 9, ill to which are pivoted the respective links ii, iii. Pivoted to the upper end of the link ii is a member l3 which is pivotally supported by an arm I 4 projecting from the aforesaid bracket 1, the member l3 carrying a pawl l5 which coacts with a ratchet wheel l6 rotatable with a tape-feeding wheel I! having a serrated peripheral surface with which is coactable a spring biased roller i8. The upper end of the link I2 is pivoted to one end of a pivoted platen bar I!) utilizable as well understood in the art for thrusting the tape T into engagement with a rotatable type wheel 20 having coactable therewith the inking rollers 2 i.

As well understood in the art, a printing device of the character herein described is remotely controlled so as to position the typing wheel 20 in printing position, to thrust the platen bar Is toward said typing wheel 20, and to operate the serrated wheel I! so as to feed the tape T from right to left, Fig. 10. g.

As shown in Figs. 1 and 2, a heavy weight 22 5 is suspended on a cable 23, this cable leading to the operating mechanism of the printing device and providing power for operating the same. A

shaft 24, when actuated by a suitable handle, not

shown, is utilizable for elevating the weight 22. 5o It will be noted that this handle actuating mechanism is at the side of the printing device opposite the printing wheel and associated mechanism. After the tape T leaves the ticker mechanism P, it is drawn through a. projection device-A whereby images of the tape characters are pro- .iected onto any suitable screen, not shown. This projection device A may be of any suitable character and, by way of example, is shown herein as comprising a housing 28 adapted to contain a projection lamp 21, its reflector 28 and one or more condensing lenses 29, one of which is shown in Fig. 3. In the example shown, the projecting light beam passes horizontally from the projection lamp 21 and engages a mirror 30 or other suitable light-reflector, said mirror 38 causing the projecting light beam to pass upwardly through a condensing lens and then through the projection field which, as herein illustrated although not necessarily, is defined by a rectangular aperture 3| formed in the top plate 3|a of a supplementary housing disposed at the front of the aforesaid housing 28.

The aforesaid tape T may be pulled or drawn through the projection field 3| by an arrangement of any suitable character. Thus, for example and as herein shown, said tape T may be passed beneath a roll 33 or other guiding surface, this roll being disposed below the horizontal plane of the projection field. Thereafter, the tape T passes over a pulling roll 34, the tape being held in engagement with the upper surface of said pulling roll 34 by an idler roll 35 mounted on a lever 38 which is biased against the roll 34 by a spring 31. After the tape passes beyond the pulling roll 34, it may be deflected by an idler roll 38, or other guiding surface, and then passed upwardly so as to be wound upon a suitable reel 38.

The aforesaid pulling roll 34 may be operated in any suitable manner. Thus, for example, the operating shaft for said pulling roll 34 may be eared to a counter shaft to which isconnected one end of a flexible shaft 48 which, at its other end. is connected to suitable gear mechanism disposed in a gear box 4|, said gear mechanism being connec d to the armature shaft of an electrical motor 43.

As herein shown, a support 44 carries the above described rolls 33, 34 and 38, the reel 39 and the various associated parts. This support 44 may be of any suitable character and it may be mounted in any suitable manner. Thus, if desired, said support 44 may be secured in suitablezgnanner to a part associated with the hous- The reel 39 may be operated in any suitable manner such, for example, as is well known in the art. Thus, the motor 43 may furnish the power for driving the reel 39, the latter, preferably. being rotated by a conventional spring belt of the endless type, the latter engaging pulleys carried, respectively, by the shaft of the reel 33 and the shaft of the pulling roll 34.

As shown in Fig. 3, the projection device A is spaced from the printing device P in such manner that a section of the tape T constantly extends between these two devices and, as hereinafter described, forms a tape loop having more or less length or extent. Adapted to engage and to be controlled in position by this tape loop is a movable member 46, Figs. 3, 4 and 5, which comprises a lateral section 48a adapted directly to engage the tape T, said section 48a being cut away as indicated at 48b, Fig. 4, so as to straddle the single row of characters on the tape T and avoid smudging of the ink forming said tape characters. In the event that there are two rows of characters extending longitudinally of the tape T, the aforesaid lateral section 48a may be provided with an offset section which engages the tape between said rows of characters.

Suitably supported, for example, by the rear wall of the aforesaid supplementary housing is a laterally extending member 41 which forms a support on which the member 48 is mounted for free oscillatory movement. The member 41 also supports two other members 48, 48 both of which are freely oscillatory the same as the member 48. The member 48, on opposite sides thereof, has the respective contact 'members 48a, 48b secured thereto. The member 48, on the lower surface thereof, has secured thereto a contact member 49a which is coactable with the contact member 48b. The above described contact member 48a is coactable with a contact member 58a secured to a member 58 which is suitably mounted in fixed position such, for example, as by means which secures it to the aforesaid housing.

The members 48, 48 carry the respective downwardly extending stems 5|, 52 which, preferably, are adjustably mounted as shown. When the member 48 is in a normal lower position, the stem 52 is spaced closer thereto than is the stem 5|.

Referring particularly to Fig. 9, the armature shaft of the motor 43 is shown as carrying a drum 53 with which is coactable a pair of brake shoes 54 carried by the respective arms 55 which are pivoted to a lug 58 projecting upwardly from the base upon which said motor 43 rests. Upstanding from and secured to the base last noted is a plate 51 which carries an electromagnetic winding 58 having a depending armature 58 slidable in a guide member carried by and pro- J'ecting from the aforesaid plate 51. Secured to and extending in opposite directions from said guide member 88 are a pair of rods 8| each of which extends through a hole formed in the adjacent arm 55. As shown, each rod 8| carries a coiled spring 82 which is confined between a collar 83 secured to said rod 8| and the adjacent arm 55. Accordingly, it results that the springs 82 bias the respective arms 55 toward each other whereby the brake shoes 54 are held in engagement with the brake drum 53.

Secured to the opposite respective sides of the armature 59 are the blocks 84 each of which comprises an outwardly inclined surface coactable, respectively, with rollers 85, 85 carried by the respective upper and inwardly extending ends of the arms 55.

As shown in Figs. 11 and 12. the armature 58 has secured thereto a plate 88 which, at one end thereof, carries a pin 18 which is engageable in an elongated slot of a member II which is secured to and movable with a mercury switch I2 suitably mounted for oscillatory movement on the aforesaid plate 51.

Extending from a suitable source of current, not shown, are a pair of conductors I3 and 14, the conductor 13 leading to one terminal of the aforesaid mercury switch 12, the other terminal of which is connected by a conductor 15 which leads to and is connected to one terminal of the motor 43. The conductor I4 leads to and is connected to the aforesaid member 58 and its contact member 5011. Connected to the member 43 and its contact member 48a is a conductor 15 which leads to and is connected to the other terminal of the aforesaid motor 43. Connected to the member 48 and its contact member 43a. 48b is a conductor TI which includes a resistance unit 18 preferably of the variable type, said conductor 11, beyond the resistance unit 18, being connected to the aforesaid conductor 18. Connected to the conductor 11, between the contact members 48a, 48b on the one hand and the resistance unit I8 on the other hand is a conductor 19 which leads to and is connected to one terminal of the aforesaid electromagnetic winding 58, the other terminal of which has secured thereto a conductor 88 which leads to and is connected to the aforesaid conductor 13. As shown in Fig. 6, a suitable variable condenser 8| may be connected across the conductors I4 and 16. Likewise, a suitable resistance unit 82 may be connected across the terminals of the motor 43.

In operation, the printing device P, the projec,tion device A, and the tape pulling mechanism are suitably grouped with respect to each other, as indicated in Fig. 3, so as to form a straight-line'path for the tape T which issues from saidprinting device P in fiatwise relation with the inked characters thereon facing upwardly and, while maintained in this relation, is drawn through the projection field 3! of said projection device A, and then wound upon the reel 39.

In connection with the described movement of the tape through said projection field, it will be noted that asuitable device such, for example, as a J-spring or, as shown, a weight 85 is disposed at the entrance to'said projection field, said weight 85 engaging the tape so as to prevent tape pulsations set up by the printing device from reaching the projection field. As shown more particularly in Figs. '7 and 8, the

weight 85 is illustrated as having spaced web sections 85a disposed adjacent opposite sides of the projection field, these web sections 85a being detachably pivoted on the respective pins 86 which extend laterally from the fixed upstanding lugs 81. At its forward edge, the weight 85 comprises a transverse websection 85b which is provided with a lower recess as at 850 for the reception of a loosely pivoted member 88 having side edges 88a adapted to engage the opposite, respective sides of the tape T, these side edges 88a being separated by a recess through which the inked surface of the tape T travels.

During those periods when the printing device P is non-operative, the tape loop at the entrance to-the projection field 3| is at its minimum length and, as a result, the member 46, 46a is in its uppermost position. When thus positioned, the member 46 is in engagement with the stems 5|, 52 wherebythe members 48, 49 are held in their uppermost positions so that all of the contact members 49a, 48b, 48a, and 50a are open. It results, therefore, that the circuit of the motor 43 is open and, therefore, the tape remains stationary. Further, at this time, the circuit of the electromagnet 58 is open and, accordingly, it results that the armature 59 therefor is in the lower position shown in Fig. 9. When said armature 59 is thus positioned, the springs 62 effectively hold the brake shoes 54, in clamping relation with respect to the brake drum 53.

If the printing device P starts to operate while the motor 43 and electromagnet 58 are deenergized as described above, the tape loop at the entrance to the projection field 3| starts to increase in length and, when sufficiently increased in length, the member 46, 46a moves to a lower position with the result that the contact member 48a engages the fixed contact member 50a whereby a circuit is completed through the motor 43 as foliows: From one side of the source of current by way of the conductor 14, member 50, contact member 50a, contact member 480., member 48, conductor ll, including the resistance unit 18, conductor 16, the winding of motor 43, conductor 15, mercury switch 12 and thence to the other terminal of the source of current by way of the conductor 13. Simultaneously with the completion of the foregoing circuit, a circuit is completed through the electromagnet 58 which is in parallel circuit with respect to the motor 43. Thus, the circuit through the electromagnet 58 extends from the conductor 11 by way of the conductor I9, the winding of electromagnet 58 and thence by way of conductor 88 to the conductor '53.

As a result of the simultaneous energlzation of the respective circuits for the motor 43 and the electromagnet'58, it results that the armature 59 of the electromagnet 58 is drawn upwardly, Fig. 9, whereby the blocks 64 swing the respective arms outwardly against the force of the springs 62. When thus swung outwardly, the brake shoes 54 release their gripping engagement upon the brake drum 53 and, when thus released, the motor 43 is free to and immediately commences operating in its normal manner whereby the roll 34 is rotated in a clockwise direction, Fig. l, to draw the tape T through the projection field. At the same time, the reel 39 is similarly rotated so that the tape is wound thereupon. As the tape thus passes through the projection field, the objective lens forms images of those tape characters in the projection field at any given time, these images being displayed upon the projection screen.

In the event that the speed of the motor 43 as thus energized is insufiicient to draw the tape from the aforesaid tape loop as fast as the tape is delivered to said loop by the printing device P, the member 46, 46a descends a greater extent than as hereinbefore described. During initial further downward movement of the member 46, the stem 52 moves therewith but, eventually, the contact member 49a-which is movable with the member 49 and the stern 52engages the contact member 481) which previously had moved to a stationary position. In so doing the resistance unit 718 is eliminated from the operating circuit of the motor 43 with consequent establishment of a new motor circuit. This new circuit for said motor 43 extends from one terminal of the source of current by way of the conductor '14, member 50, contact member 50a, contact member 48a, contact member 482), contact member 49a, conductor t6, the winding of motor 43, conductor "i5, mercury switch 12, and thence to the other terminal of the source of current by way of the conductor K3. With the resistance uni-t 18 thus eliminated from its circuit, the motor 43 speeds up and draws the tape from the aforesaid tape loop at a rate faster than the rate at which tape is delivered thereto by the printing device P. The establishment of the new operating circuit for the motor 43 as described above has no effect on the electromagnet 58. This is necessarily true because the previously established circuit therefor remains energized even though the resistance unit 68 is eliminated from the motor circuit.

When operation of the printing device P is discontinued, the motor 43 continues to operate until the tape loop is shortened to such extent that the member 46, 46ahas been moved to its uppermost position. At this time, as previously stated, the operating circuits for the motor 43 and for the electromagnet 58 are opened.

Therefore, at this time, the motor 43 is stationary and the brake shoes 54 are in clamping engagement with respect to the drum 54 on the armature thereof.

The motor control arrangement including the circuits and brake features as herein described is utilizable particularly, although not necessarily, with a variable speed motor, such as a direct current motor having a series field winding. With such an arrangement, it becomes practical to position the printing device P and the projection device A in such close relation with respect to each other, Figs. 1 and 3, that the length of the tape loop between these two devices is much shorter than exists in prior art projection arrangements of the general character herein described. Thus, in actual practice, it has been demonstrated that the tape between the printing zone and the entrance to the projection field has a length of approximately 1 inch when the tape-drawing motor 43 is not operating and a length of approximately 1% inches when said motor 43 is operating. It shall be understood, however, that my invention is not to be limited to the exact tape loop lengths just specified.

It follows, therefore, in accordance with my invention, that the controlling tape loop is substantially shorter at all times than is-the corresponding tape loop of commercial devices as at present used. This is highly advantageous. In this connection and as well understood in the art, it is noted that operation of printing mechanisms of the character herein referred to often ceases,

for one reason or another, for a few seconds or for greater intervals of time. Each time that this happens, there is a length of tape between the printer mechanism and the projector which bears a number of characters and the images of these characters are not projected until opera- ,ion of the tape-drawing motor is again initiated in response to renewed operation of said printer mechanism. The delayed projection of these character images may result disadvantageously by reason of the fact that they may convey important information. In accordance with my invention, by reason of the short tape loop which continuously exists between the printer mechanism and the projector, the chance that there may be a delay in the projection of character images conveying important information is greatly reduced. This is highly advantageous and desirable,

Referring to Figs. 7 and 8, I have illustrated the above described transverse web section "b of the weight as formed with a slot 85c which receives the periphery of the wheel 24 as the latter rotates during the printing operation. This is advantageous because decreasing the length of the loop for the advantageous result noted above.

Referring to Figs. 1 and 2, the above described base 6, on the upper surface thereof, carries a plurality of spaced tracks 90 disposed in parallel relation with respect to the path of the tape T through the projection field, said tracks 90 being provided with upwardly facing rack teeth with each of which a gear wheel 8| is adapted to mesh, the gear wheels 9| being secured to and rotatable with a shaft 92 moimted in bearings in the lower housing 4, the shaft 02 on its outer end carrying a hand wheel 83. The lower housing 4 is freely slidable on the base 8 and the movement thereof is guided by the aforesaid tracks 80 and other suitable guide members 900. Obviously, rotation of the hand wheel as in the proper direction causes the entire printing device P to be moved either toward or from the projection device A. Accordingly, when said printing device P is disposed in proper operative relation with respect to the projection device A as shown in Fig. 1, it follows that the hand wheel 93 may be rotated in a counter-clockwise direction, Fig. 1, while the roller III is held elevated, to move said printing device P to the position shown in Fig. 2. When in the position last named, the printing device P may readily be serviced, adjustments may be made with ease. etc.

As shown in Figs, 1 and 2, the wall of the lower housing 4 toward the right may be apertured for the reception of the-operative end of a lever 04 pivoted on spaced lugs as upstanding from the base 6, this lever 94 being suitably biased into latching position by a spring 96. When it is desired to move the printing device P to servicing position, the lever 94 may readily be released by swinging the same in a clockwise direction. Fig. 1. In as simple a manner, said printing device P may be latched in operative position as shown in Fig. 1, a stop surface 01, Figs. 1 and 2 defining the position last noted.

The herein described circuit arrangement operates in a highly practical manner for the intended purpose. As will be understood from the description hereinbefore given, the mercury switch I2 moves from the full-line to the brokenline position thereof and vice versa, Fig. 11, under control of the armature so. Further, the arrangement is such that the circuit through the mercury switch I2 is open when the armature I is in its lower position, Fig. 9, and closed when said armature II is in its upper position.

It results, therefore, that the mercury switch I2 exercises a control on the circuit of the motor 43 which is supplementary to the control exercised by the contact members 58a, 48a, 48b and 49a. .Thus, when the armature 50 is in its lower position, the circuit through the motor 43 is open. Therefore. if the electromagnet 58 should burn out while the tape-pulling means is operating under control of the motor 43, the armature 8| would move to lower position and (1) apply the brake shoes 64 to the drum S3, and (2) open the circuit of said motor 42. The mercury switch 12 and the control exercised thereby, then, constitutes a means of protecting the motor 42 in case the electromagnet 58 should burn out and apply the brake shoes 54.

As clearly appears from Figs. 1 and 3, the housings 4 and i in part at least are disposed in front of the projection field 3|. These housings contain the mechanism for operating the printing device and the grouping thereof as set forth with respect to the projection field constitutes an advantageous feature of my invention.

As shown in Fig. 2, the switching mechanism which comprises the members 46, 48, 49 and associatedpartsisdisposedattherearofthe projection field and extends longitudinally there- 01'. Preferably, as shown in said Fig. 2, this switching mechanism is dispomd within a supplementary casing 08 which should be detachably related to its supporting surfaces.

The herein described printing device P may be either of the constant speed or variable speed type. As stated, the motor 43 may be of the variable speed type. Experience has demonstrated that, when'using such a variable speed motor, the two-speed control mechanism in combination with the brake device gives satisfactory results. That is. a tape loop of the specified desirable minimum lengths may be employed and, even so, there is little or no chance that the tape will be broken, torn, or improperly pulled through the printer.

It shall be understood that'my invention is not to be limited to a control such as is imposed by a member 46, 4611, or equivalent, which rides upon the tape. As well, there may be utilized suction control such, for example, as of the general character disclosed in Curtis Patent No. 2,028,146.

It shall also be understood that movement of the tape through the projection field may be effected otherwise than 'as herein described. Thus, in lieu of a tape-pulling arrangement at the exit end of the projection field, there may be utilized a pair of tape-moving rollers of the character disclosed in my pending application Serial No. 37,501, filed August 23, 1935.

While the invention has been described with respect to a certain particular preferred example which gives satisfactory results, it will be understood by those skilled in the art after understanding the invention, that various changes and modifications may be made without departing from the spirit and scope of the invention and it is intended therefore in the appended claims to cover all such changes and modifications.

. What is claimed as new and desired to be secured by Letters Patent is:

1. In combination, a motor for drawing a character-bea'ring tape through a projection field after passage thereof from a printing device, means for controlling the operation of said motor, said means comprising a pivoted member extending longitudinally along said projection field and adapted to be controlled by a loop in said tape, a pair of movable members disposed above said pivoted member and extending longitudinally along said projection field, means whereby said pivoted member, upon elevation thereof, engages said movable members in succession, and switch contacts associated with said movable members for controlling the circuit of said motor.

2. In combination, a motor for drawing a character-bearing tape through a projection field after passage thereof from a printing device, means for controlling the operation of said motor, said means comprising a pivoted member extending longitudinally along said projection field and adapted to be controlled by a loop in said tape, a pair of movable members disposed above said pivoted member and extending longitudinally along said projection field, said pivoted member and said movable members being pivoted on the same axis, said movable members having stems of different lengths secured thereto respectively, said stems extending toward said pivoted member whereby they are engaged in succession by said pivoted member upon elevation of the latter, and switch contacts associated with said movable members for controlling the circuit of said motor.

3. In an arrangement 01' the character described, a projector housing, a printing device at one side of said projector housing, said printing device comprising means for feeding a tape along substantially a horizontal path to the printing position, and-means for drawing said tape horizontally through a projection field at the top of said projector housing, said printing device comprising ahousing structure positioned in part at least at the side of and in front of said p jector housing.

4. In an arrangement of the character described, a horizontal base, a printing device and Y a projection device mounted on said base in sideby-side relation, said printing device comprising means for feeding a tape along substantially a horizontal path to the printing position, means for drawing. said tape horizontally through the projection field of said projection device, and means for moving said printing device along said horizontal base either toward or from said projection field, said means controlling said printing device for movement along a straight horizontal path longitudinally alined with said projection field. B

5. In an arrangement of the character described, a horizontal base, a printing device and a projection device mounted on said base in sideby-side relation, said printing device comprising means for feeding a tape alongsubstantially a horizontal path to the printing position, means for drawing said tape horizontally through the projection field of said projection device, horizontal track means associated with said base in parallel relation with the length of the projection field of said projection device for movement therealong of said printing device, means for moving said printing device either toward or from said projection device, and means for retaining said printing device in operative position.

6. In combination, a printing device from which a character-bearing tape extends to and through a projection field, a motor for drawing the tape through said projection field, means whereby a loop in said tape controls the operation of said motor, a brake mechanism cooperative with said motor, means whereby said tape loop causes said brake mechanism to discontinue the operation of said motor in an instantaneous manner, switching means included in the cir-- cuit of said motor, and means whereby said switching means is controlled in accordance with the position of said brake mechanism.

'7. In combination, a printing device from which a character-bearing tape extends to and through a projection field, a motor for drawing the tape through said projection field, means for changing the speed of said motor, means whereby a loop in said tape controls said speed-changing means to thereby cause the tape to be drawn through said projection field at diiierent rates of speed, a brake mechanism cooperative with said motor, means whereby said tape loop causes said brake mechanism to discontinue the operation of said motor in an instantaneous manner, switching means included in the circuit of said motor, and'means whereby said switching means is controlled in accordance with the position of said brake mechanism.

8. In combination, a motor for drawing a character-bearing tape through a projection field after passage thereof from a printing device, means for controlling the operation of said motor, said means comprising a pivoted member extending longitudinally along said projection field and adapted to be controlled by a loop in said tape, a pair of movable members disposed adjacent said pivoted member and extending longitudinally along said projection field, means whereby said pivoted member, when changed in position by said tape, actuates said movable members in succession, and switch contacts associated with said movable members for controlling the circuit or said motor.

DAVID F. NEWMAN. 

